If you want to manage your own international domain name like .net or .com why not try Name.com if you follow this link I get a referral bonus.
In my experience you can often save some money and the user interface is more logical than some (UK) competitors.
Remember to change the billing currency from US Dollars to GB Pounds if you do use their service.
A further suggestion for .UK now that they seem to be getting more expensive is OVH a french company!?